stringutil.java

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            if (!(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z'
                    || c >= '0' && c <= '9'
                    || c == '_' || c == '-' || c == '.' || c == '!' || c == '~'
                    || c >= '\'' && c <= '*')) {
                break;
            }
        }
        if (i == ln) {
            // Nothing to escape
            return s;
        }

        StringBuffer b = new StringBuffer(ln + ln / 3 + 2);
        b.append(s.substring(0, i));

        int encstart = i;
        for (i++; i < ln; i++) {
            char c = s.charAt(i);
            if (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z'
                    || c >= '0' && c <= '9'
                    || c == '_' || c == '-' || c == '.' || c == '!' || c == '~'
                    || c >= '\'' && c <= '*') {
                if (encstart != -1) {
                    byte[] o = s.substring(encstart, i).getBytes(charset);
                    for (int j = 0; j < o.length; j++) {
                        b.append('%');
                        byte bc = o[j];
                        int c1 = bc & 0x0F;
                        int c2 = (bc >> 4) & 0x0F;
                        b.append((char) (c2 < 10 ? c2 + '0' : c2 - 10 + 'A'));
                        b.append((char) (c1 < 10 ? c1 + '0' : c1 - 10 + 'A'));
                    }
                    encstart = -1;
                }
                b.append(c);
            } else {
                if (encstart == -1) {
                    encstart = i;
                }
            }
        }
        if (encstart != -1) {
            byte[] o = s.substring(encstart, i).getBytes(charset);
            for (int j = 0; j < o.length; j++) {
                b.append('%');
                byte bc = o[j];
                int c1 = bc & 0x0F;
                int c2 = (bc >> 4) & 0x0F;
                b.append((char) (c2 < 10 ? c2 + '0' : c2 - 10 + 'A'));
                b.append((char) (c1 < 10 ? c1 + '0' : c1 - 10 + 'A'));
            }
        }
        
        return b.toString();
    }
    
    private static char[] createEscapes()
    {
        char[] escapes = new char['\\' + 1];
        for(int i = 0; i < 32; ++i)
        {
            escapes[i] = 1;
        }
        escapes['\\'] = '\\';
        escapes['\''] = '\'';
        escapes['"'] = '"';
        escapes['<'] = 'l';
        escapes['>'] = 'g';
        escapes['&'] = 'a';
        escapes['\b'] = 'b';
        escapes['\t'] = 't';
        escapes['\n'] = 'n';
        escapes['\f'] = 'f';
        escapes['\r'] = 'r';
        escapes['$'] = '$';
        return escapes;
    }

    public static String FTLStringLiteralEnc(String s)
    {
        StringBuffer buf = null;
        int l = s.length();
        int el = ESCAPES.length;
        for(int i = 0; i < l; i++)
        {
            char c = s.charAt(i);
            if(c < el)
            {
                char escape = ESCAPES[c];
                switch(escape)
                {
                    case 0:
                    {
                        if (buf != null) {
                            buf.append(c);
                        }
                        break;
                    }
                    case 1:
                    {
                        if (buf == null) {
                            buf = new StringBuffer(s.length() + 3);
                            buf.append(s.substring(0, i));
                        }
                        // hex encoding for characters below 0x20
                        // that have no other escape representation
                        buf.append("\\x00");
                        int c2 = (c >> 4) & 0x0F;
                        c = (char) (c & 0x0F);
                        buf.append((char) (c2 < 10 ? c2 + '0' : c2 - 10 + 'A'));
                        buf.append((char) (c < 10 ? c + '0' : c - 10 + 'A'));
                        break;
                    }
                    default:
                    {
                        if (buf == null) {
                            buf = new StringBuffer(s.length() + 2);
                            buf.append(s.substring(0, i));
                        }
                        buf.append('\\');
                        buf.append(escape);
                    }
                }
            } else {
                if (buf != null) {
                    buf.append(c);
                }
            }
        }
        return buf == null ? s : buf.toString();
    }

    /**
     * FTL string literal decoding.
     *
     * \\, \", \', \n, \t, \r, \b and \f will be replaced according to
     * Java rules. In additional, it knows \g, \l, \a and \{ which are
     * replaced with &lt;, >, &amp; and { respectively.
     * \x works as hexadecimal character code escape. The character
     * codes are interpreted according to UCS basic plane (Unicode).
     * "f\x006Fo", "f\x06Fo" and "f\x6Fo" will be "foo".
     * "f\x006F123" will be "foo123" as the maximum number of digits is 4.
     *
     * All other \X (where X is any character not mentioned above or End-of-string)
     * will cause a ParseException.
     *
     * @param s String literal <em>without</em> the surrounding quotation marks
     * @return String with all escape sequences resolved
     * @throws ParseException if there string contains illegal escapes
     */
    public static String FTLStringLiteralDec(String s) throws ParseException {

        int idx = s.indexOf('\\');
        if (idx == -1) {
            return s;
        }

        int lidx = s.length() - 1;
        int bidx = 0;
        StringBuffer buf = new StringBuffer(lidx);
        do {
            buf.append(s.substring(bidx, idx));
            if (idx >= lidx) {
                throw new ParseException("The last character of string literal is backslash", 0,0);
            }
            char c = s.charAt(idx + 1);
            switch (c) {
                case '"':
                    buf.append('"');
                    bidx = idx + 2;
                    break;
                case '\'':
                    buf.append('\'');
                    bidx = idx + 2;
                    break;
                case '\\':
                    buf.append('\\');
                    bidx = idx + 2;
                    break;
                case 'n':
                    buf.append('\n');
                    bidx = idx + 2;
                    break;
                case 'r':
                    buf.append('\r');
                    bidx = idx + 2;
                    break;
                case 't':
                    buf.append('\t');
                    bidx = idx + 2;
                    break;
                case 'f':
                    buf.append('\f');
                    bidx = idx + 2;
                    break;
                case 'b':
                    buf.append('\b');
                    bidx = idx + 2;
                    break;
                case 'g':
                    buf.append('>');
                    bidx = idx + 2;
                    break;
                case 'l':
                    buf.append('<');
                    bidx = idx + 2;
                    break;
                case 'a':
                    buf.append('&');
                    bidx = idx + 2;
                    break;
                case '{':
                    buf.append('{');
                    bidx = idx + 2;
                    break;
                case 'x': {
                    idx += 2;
                    int x = idx;
                    int y = 0;
                    int z = lidx > idx + 3 ? idx + 3 : lidx;
                    while (idx <= z) {
                        char b = s.charAt(idx);
                        if (b >= '0' && b <= '9') {
                            y <<= 4;
                            y += b - '0';
                        } else if (b >= 'a' && b <= 'f') {
                            y <<= 4;
                            y += b - 'a' + 10;
                        } else if (b >= 'A' && b <= 'F') {
                            y <<= 4;
                            y += b - 'A' + 10;
                        } else {
                            break;
                        }
                        idx++;
                    }
                    if (x < idx) {
                        buf.append((char) y);
                    } else {
                        throw new ParseException("Invalid \\x escape in a string literal",0,0);
                    }
                    bidx = idx;
                    break;
                }
                default:
                    throw new ParseException("Invalid escape sequence (\\" + c + ") in a string literal",0,0);
            }
            idx = s.indexOf('\\', bidx);
        } while (idx != -1);
        buf.append(s.substring(bidx));

        return buf.toString();
    }

    public static Locale deduceLocale(String input) {
       Locale locale = Locale.getDefault();
       if (input.charAt(0) == '"') input = input.substring(1, input.length() -1);
       StringTokenizer st = new StringTokenizer(input, ",_ ");
       String lang = "", country = "";
       if (st.hasMoreTokens()) {
          lang = st.nextToken();
       }
       if (st.hasMoreTokens()) {
          country = st.nextToken();
       }
       if (!st.hasMoreTokens()) {
          locale = new Locale(lang, country);
       }
       else {
          locale = new Locale(lang, country, st.nextToken());
       }
       return locale;
    }

    public static String capitalize(String s) {
        StringTokenizer st = new StringTokenizer(s, " \t\r\n", true);
        StringBuffer buf = new StringBuffer(s.length());
        while (st.hasMoreTokens()) {
            String tok = st.nextToken();
            buf.append(tok.substring(0, 1).toUpperCase());
            buf.append(tok.substring(1).toLowerCase());
        }
        return buf.toString();
    }

    public static boolean getYesNo(String s) {
        if (s.startsWith("\"")) {
            s = s.substring(1, s.length() -1);

        }
        if (s.equalsIgnoreCase("n")
                || s.equalsIgnoreCase("no")
                || s.equalsIgnoreCase("f")
                || s.equalsIgnoreCase("false")) {
            return false;
        }
        else if  (s.equalsIgnoreCase("y")
                || s.equalsIgnoreCase("yes")
                || s.equalsIgnoreCase("t")
                || s.equalsIgnoreCase("true")) {
            return true;
        }
        throw new IllegalArgumentException("Illegal boolean value: " + s);
    }

    /**
     * Splits a string at the specified character.
     */
    public static String[] split(String s, char c) {
        int i, b, e;
        int cnt;
        String res[];
        int ln = s.length();

        i = 0;
        cnt = 1;
        while ((i = s.indexOf(c, i)) != -1) {
            cnt++;
            i++;
        }
        res = new String[cnt];

        i = 0;
        b = 0;